79721027 has 2 divisors, whose sum is σ = 79721028. Its totient is φ = 79721026.

The previous prime is 79721009. The next prime is 79721039. The reversal of 79721027 is 72012797.

It is a strong prime.

It is an emirp because it is prime and its reverse (72012797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79721027 - 2¹⁶ = 79655491 is a prime.

It is not a weakly prime, because it can be changed into another prime (79721077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39860513 + 39860514.

It is an arithmetic number, because the mean of its divisors is an integer number (39860514).

Almost surely, 2^79721027 is an apocalyptic number.

79721027 is a deficient number, since it is larger than the sum of its proper divisors (1).

79721027 is an equidigital number, since it uses as much as digits as its factorization.

79721027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 79721027 is about 8928.6632258138. The cubic root of 79721027 is about 430.3854970946.

The spelling of 79721027 in words is "seventy-nine million, seven hundred twenty-one thousand, twenty-seven".